<!DOCTYPE html>
<html lang="zh-CN">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    // const pi = 3.14
    // console.log(pi);

    // pi = 8
    // console.log(pi);

    // const pi

  </script>
</body>

</html>